The invention discloses a device and method for regulating warping of a glass plate. The device comprises overflow down-drawing forming equipment. Glass plate cutting equipment is arranged at the rear end of the overflow down-drawing forming equipment, and a traction roller is arranged between the overflow down-drawing forming equipment and the glass plate cutting equipment. The holding force of the traction roller to a glass plate is increased, in an overflow down-drawing method, the clamping force of the traction roller is greatly affected by friction force between the surface of a boss and the glass plate, the friction coefficient of the surface of the boss is increased, friction force is increased, therefore, the glass plate runs stably through the method of increasing the clamping force, and warping badness caused by back-and-forth running of the glass plate is eliminated.